Gliclazide impurity F:N-[(perhydrocyclopenta[c]pyrrol-2-yl)aminocarbonyl]-o-toluenesulfonamide

Gliclazide impurity F: N-[(perhydro­cyclo­penta­[c]pyrrol-2-yl)amino­carbon­yl]-o-toluene­sulfonamide

The title compound, C(15)H(21)N(3)O(3)S, is known to be an impurity of gliclazide [systematic name: N-(hexa-hydro-1H-cyclopenta[c]pyrrol-2-ylcarbamo-yl)-4-methyl-benzene-sulfonamide], a sul-fonyl-urea anti-diabetic drug. Gliclazide has a p-tolyl group substituting the sulfonamide functionality, while the title mol-ecule contains an o-tolyl group. Both five-membered fused rings adopt envelope co...

Foreword Introduction O - Toluenesulfonamide Cas N ° : 88 - 19 - 7

Cu 2 O ( 1 1 0 ) formation on Co 3 O 4 ( 1 1 0 ) induced by copper impurity segregation

The surface crystal structure of the Co3O4(1 1 0) spinel was characterized by low energy electron diffraction (LEED), X-ray photoelectron spectroscopy (XPS), and Auger electron spectroscopy (AES). Well-defi ned LEED diffraction patterns showed an unreconstructed Co3O4(1 1 0) surface in Type A termination, and XPS and Auger indicated the surface to be stoichiometric with octahedral and tetrahedr...

On the Multiplicative Order of Fn+1/fn modulo Fm

Here, we show that if s �∈ {1, 2, 4} is a fixed positive integer and m and n are coprime positive integers such that the multiplicative order of Fn+1/Fn modulo Fm is s, where Fk is the kth Fibonacci number, then m < 500s2.

Poly[tetra­aqua­bis­(μ3-oxalato-κ5 O 1,O 2:O 1′:O 1′,O 2′)(μ2-oxalato-κ4 O 1,O 2:O 1′,O 2′)dipraseodymium(III)]

In the title complex, [Pr(2)(C(2)O(4))(3)(H(2)O)(4)](n), the two independent Pr(III) ions are both nine-coordinated in a distorted monocapped square-anti-prismatic geometry by seven O atoms from four oxalate ligands and two water mol-ecules. The Pr(III) ions are bridged by the oxalate ligands, forming a layer parallel to (001). O-H⋯O hydrogen bonds connect the layers.